Jan Walraven
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  • Posted on February 23, 2012

    You can issue multiple ADD, ALTER, DROP, and CHANGE clauses in a single ALTER TABLE statement, separated by commas. This is a MySQL extension to standard SQL, which permits only one of each clause per ALTER TABLE statement. For example, to drop multiple columns in a single statement, do this:

    
    ALTER TABLE t2 DROP COLUMN c, DROP COLUMN d;